> Please RTFM Postfix documentation. If it does not mention IP addresses
> then it does not use the IP addres,
I did read the manual which says:
"Reject the request when the HELO or EHLO hostname has no DNS A or MX
record."
Good. Does it mention IP addresses? No it doesn't. Therefore
it doesn't use them.
Our brains obviously work different. You keep saying it doesn't mention
IP addresses when it clearly says "DNS A record". A DNS A records *IS*
an IP address so the manual DOES mention IP addresses. I would like to
understand your way of thinking, how is that not mentioning IP addresses
to you?